Money and payroll
Korean labour rules, dated and tested.
Products Avenpa Tool
Avenpa Tool
One site with a set of small jobs. You open the page, get the number or the finished file, and close the tab. Nothing asks you to register first.
What is in it
Grouped by the job they do.
Every name below links straight into the live site.
Time and dates
Counted against the real calendar, not an average month.
Images
Processed on your device, so there is no upload step.
Numbers and text
The arithmetic you would otherwise do twice.
Engineering
How it is built
The short version, minus the architecture diagram.
01
Pages first, server second
Every page is prerendered and served straight from the edge. The worker only wakes up for the routes that genuinely need logic, so a cache hit never costs anyone a cold start.
02
Media in the browser
Canvas and FileReader do the image work on the device holding the photo, so the file is never sent anywhere and there is no queue to wait in.
03
One database, no dependencies
Accounts, sessions and saved tools live in SQLite bound to the worker. There is no separate database host to be down at 2am.
04
Numbers carry tests
A calculator that is quietly wrong is worse than none, so the rates and thresholds are asserted in the test run rather than trusted.
The difference
Not in it
Worth naming, because most tool sites do exactly the opposite.
01
Tools open for anyone with the link
An account exists only if you want to save what you made. Nothing you open asks you to register first.
02
One step between you and the number
The tool opens with the fields you need and the answer underneath them. There is nothing to dismiss first.
03
Numbers with a year on them
Where a rate or a threshold is applied, the page says which year it is for.
Something missing?
If a calculation came out wrong, say which tool and what you expected. Those messages get fixed first.
Write to the studio